Apparatus for mixing and kneading dough.



PATENTED MAY 9, 1905.

J. KOELNER.

D KNEADING DOUGH.

APPLICATION IILEIJ JUNE 11, 1904.

APPARATUS FOR MIXING AN signed more especially for household use.

NITED STATES Patented May 9, 1995.

PATENT OFFICE.

APPARATUS FOR MIXING AND KNEADING DOUGH.-

SPECIFICATION forming part of Letters Patent No. 789,614, dated May 9,1905.

Application filed June 11, 1904- Serial No. 212,140-

lo all whom it may calmer/L.-

Be it known that I, J onN KOELNER, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented new and useful Improvements in Apparatus forMixing and lineading Dough, of which the following is a specification.

This invention relates to certain new and useful improvements inapparatus for mixing and kneading dough, and aims to improve in certain.particulars the apparatus forming the subject-matter of Letters PatentNo. 743,090 granted to me November 3, 1.903. The machine forming thesubj ect-matter of said patent was designed for use in mills for testingthe flour, whereas the present machine is dey In the said patentedmachine the trough or receptacle for the dough is disposed horizontally,and the mixing and kneading blade is adjustably secured upon thedriving-shaft and has a uniform width throughout.

The present invention relates to a machine which is normally inclined tothe horizontal and has at its lower end or bottom a water jacket orcompartment, and the spiral blade mounted within the dough-receptaclehas a widened terminal edge portion working in close proximity to thewall of said water-compartment.

In order that the invention may be clearly understood, I haveillustrated the same in the accompanying drawings, in which Figure 1 isa vertical sectional view. Fig. 2 is a top plan view, and Fig. 3 is a(letail view of the blade.

Referring to the drawings, 1 indicates the dough-receptacle, which issupported in an. inclined position on a base 2. The receptacle 1. isprovided at its lower end or bottom with a projecting tongue 3, which isdesign ed to be received under a keeper 1, provided. on the base 2 nearone end thereof. At the opposite endv of the base two similar keepers 5are provided. Secured to the upper end of the receptacle 1 is a supportfor the receptacle comprising uprights 6, connected by a flat cross-bar7 at their lower ends, which is designed to be received beneath the twokeep- -being formed as an integral structure.

ers 5, referredv to. By this means the apparatus as a whole may beremovably secured in an inclined position on the support 2 by simplpassing the tongue 3 and, the crossbar 7 beneath the respective keepers4- and 5.

8 indicates a bearing secured on the upper end of the receptacle 1 andinv which is adjustably mounted a shaft 9, having secured on. its upperend a crank-handle 10. Said shaft is provided intermediate its ends withtwo separated grooves 111 1.2. On the opposite ends of the shaft issuitably secured the mixing and kneading blade consisting of a hub 13,an arm 1 1, j'n'ojecting at right angles to said hub, and a spiral blade15, extending from the arm 14, said hub, arm, and blade 7 The terminalportion or free end of said spiral blade is widened approximately toabout twice the width of the remaining portion of the blade, asindicated at 16. The upper half of the bearing 8 is provided on itsunder side with. a recess 17, which is designed to receive a curvedblock or chuck 18, having a pin 19, extending upward through an aperturein the bearing. The chuck 1.8 is designed to fit into the one or theother of the grooves 11 12 of the shaft 9. For example,

suppose the shaft 9 to be in its extreme 1nward adjusted position. Thechuck 18 will then be in the groove 12. If it be desired to adjust thespiral blade so that the terminal portion 16 shall be at a greaterdistance from the bottom 20 of the receptacle, the operator grasps thepin 19 and raises the chuck 18 out of the groove 12. The handle 10 isthen grasped and an outward pull applied thereto which will draw theshaft 9 outward until the groove 11 comes beneath the chuck 18, when theoperator then presses the pin 19 inward, so that said chuck will engagein said groove 11. The shaft will thus be held in this adjusted positionand may be freely rotated, the chuck working smoothly in either of saidgrooves.

It will be seen that the construction. described provides a much simplermeans of adjusting the spiral blade than that shown in my patentreferred to, the adjusting mechanism being on the outside of theapparatus I the same time that the inclined position posand within easyreach. To facilitate the adjustment of the shaft, I provide on thecrankhandle an auxiliary handle 21 intermediate the ends of the crankportion.

In the construction shown in the patent above noted, as well as in otherprior patents granted to me, the dough receptacle or trough is openthroughout its entire length on its upper side. In the presentconstruction I cut away a portion only of the cylinder forming thereceptacle 1 to provide an opening 22, leaving a covered portion 23,which is necessary, owing to the inclined position of the receptacle. Inaddition I provide a water-compartment 24 adjacent to the end 20, whichmay be supplied with water at a given temperature in order to maintainthe dough at a uniform temperature during the mixing and kneading. Thewidened end portion 16 of the blade assures the maximum kneading effect,in that a larger quantity of the dough will be pressed against thebottom 20 of the receptacle than would be the case were the blade of auniform width throughout, as in my previous constructions.

The inclined position of the receptacle will cause the liquidconstituents of the dough in the initial mixing to flow to the bottom ofthe receptacle, where they may be more rapidly mixed or combined withthe flour. At

sesses this advantage over the horizontal position it also possesses theadvantage over a vertically-disposed receptacle in that it will notprevent to such a great extent the retrogressive movement of the doughin the kneadmg operation.

The ingredients of the dough when first placed in the receptacle are ina liquid or watery condition, so that when the spiral blade is turnedall of the constituents of the dough will be thoroughly mixed. Flour isof course added from time to time and the dough is finally obtained in athick plastic condition. The spiral blade is then adjusted inwardly tomove the shaft 9, as previously described, so as to bring the broadenedterminal portion 16 into substantially close relation to the bottom 20of the receptacle. The rotation of the blade is then continued throughthe medium of the crank-handle 10 and the operation of mixing andkneading progresses HIL- der the action of the spiral blade in a mannerwell known to those skilled in the art.

Having thus fully described the invention, What I claim as new, anddesire to secure by Letters Patent, is

1. Apparatus for mixing and kneading dough, comprising an inclinedcylindrical receptacle having an opening 22 formed in its upper side atits upper end, and a covered portion 23 provided at its lower end, awater jacket or compartment also provided at said lower end, a spiralblade mounted in said receptacle and concentric to the axis thereof, andhaving a widened terminal edge portion working in proximity to the wallof said compartment, and means for turning said blade.

2. Apparatus for mixing and kneading dough, comprising a receptacle, abearing mounted on said receptacle, a shaft mounted in said bearing andextending into said receptacle and capable of longitudinal movement insaid bearing and said receptacle and provided with a number of grooves,a blade mounted on said shaft and located within said receptacle, amovable chuck mounted in said bearing and adapted to engage in one orthe other of said grooves, and means for turning said shaft.

3. Apparatus for mixing and kneading dough, comprising a receptacle, 2.bearing mounted thereon, and provided with an interior recess, a shaftmounted in said bearing and extending into said receptacle and capableof longitudinal movement in said bearing and said receptacle, andprovided with a number of grooves, a chuck adapted to seat in saidrecess and to be moved into engagement with one or the other of saidgrooves, a pin secured in said chuck and projecting outward through thebearing, and a handle for turning said shaft.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN KOELNER. Witnesses:

FRED. G. DORNER, E. G. RAHR.

